Engine or pump construction.



CuA. ANDERSON.

ENGINE OR PUMP CONSTRUCTION.

APPLICATION FILED JAN-7.19m.

Patented Oct. 23,1917. I

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. and useful: Improvements in Engine or .Pump Constructions, of which the following is a specification.

This invention relates to, improvements in pump or engine construction and refers more particularly to an improvement in a construction adapted for use in boiler systems, refrigeratin systems and the/like, although in its broa er aspects, the invention is not limited to the particular uses or purposes mentioned. 7

Among the salient'objects of the invention are to provide a construction which can be used either as a' pump or engine or as a combined engine and pump; to provide a construction which is adapted for use with various kinds of motive fluid, such as steam, vapor, gas, air or the like; to provide a construction of the character referred to in which one of the salient features of the device is to so connect the piston and drive or driven shaft member as to reduce to a minimum the torsional strain on the crank cas ing or other connection; to provide a construction which when used as a pump eliminates check valves, the inlet and discharge ports being controlled by a reciprocatory and rotating piston; to provide a construction which when used as an engine eliminates the cut off and inlet valves because the pis-v ton itself serves as a valve member; to provide in a construction of the character referred to novel arran ement of the ports or valve ducts in the p ston itself which cooperate with the inlet and discharge ports,-

.sure pump is equipped with equal means for limiting the end thrust on the drive shaft; to provide a construction in which enemas a. masses, or omcaeo, rumors.

Specification of Letters Patent.

Application filed January 7, 1916. Serial No. 70,777.

' for with the stufling box as shown at 21.

PATENT OFFICE.

Patented Oct. 23, 1917.

adjustable packing members are provided preventing leakage particularly when the novice is used with high pressure; to provide a simple and compact structure which may be economically manufactured and yet is accurate and reliable in operation and in general to provide an improved construction of the character referred to.

In the drawings Figure 1 is a vertical sectional view of my invention;

Fig. 2 is a transverse sectional. view taken on lines 22 of Fig. 1 and looking in the direction of the arrows;

Fig. 3 is a transverse sectional view taken on lines 3--3 of Fig. 1 and looking in the direction of the arrows; u p

Fig. 4 is a fragmentaryside' elevation of the piston showing more particularly the valve duct arrangement;

Fig. 5 is an end elevation of one of the follower plates. I

Referring to the drawings 1 designates as a-whole, a casing prefs erably formed of a main body casting 2, and an end plate casting 3, the latter being provided with an angularly disposed tubular extension 4 which forms a piston cylinder hereafter referred to. At its front end, the main casting 2 is provided with a longitudinally extending shaft bearing 5. The casing is preferably provided with a pair of 4 suitable support by screws 8. The end plate 3' is secured to the main casting by screws 9 extending through opposed flanges 10 and 11. Within the bearing member 5 is mounted a shaft 12, on the end of which is fixedly secured a fly wheel 13. The front end of the shaft 12 is provided with a reduced extension 14. Between the fly wheel, and casing is interposed a fiber washer 15 and between the off set portion of the shaft and a suitable packing member 16 is interposed a second washer 17. The front end of the bearing 5 is provided with a screw threaded extension 18 to receive a stufiing box 19 between which and the end of the screw threaded extension 18 is interposed a packing ring 20. The member 16 has screw threaded engagemjpt n auxiliary packing ring 22 is also provided, this ring being seated in a socket 23 formed in the end of the member 16 and held in position by nut 24 which in turn-has a screw threaded engagement with the member 16 65 Y-shaped duct 49 cut in the periphery of as shown at 25. By the adjusting members just described the pressures on the pack ng members 15 and 17 are capable of being regulated as desired. The arrangement 1s such as to effectively prevent any leakage of gas (where gas is used) past the shaft.

A follower plate 27 is screwed or bolted onto this fly wheel as shown at 26. WVhile the invention is not limited to this particular construction, I have shown this plate as provided with a forked extension 28 adapted to receive and confine a crank pin 29. The front end of the crank pin is secured to the fly wheel by a ball and socket joint, comprising a ball 30, screw threaded as shown at 31 to the pin and seated in a suitable socket 32 formed in the face of the fly Wheel, and in the face of the follower plate. The rear end of the crank pin is secured to the piston in the manner hereinafter described.

Describing now the arrangement of the piston, the latter preferably takes the form of a cylindrical rod 33 ,which extends throughout and projects beyond the inner end of the piston cylinder, and terminates' in a crank arm 34 which is provided with a socket 35 to receive'the ball 36, of the crank pin 29. The ball is held in this socket by means of a follower plate 37 screwed as shown at 38 tothe crank arm 34, and provided with a socketed portion 39' which fits around the ball. The follower plate is slotted over the crank pin through an aperture 40. Similarly, the follower plate27 heretofore described, is slotted into position through a similar opening 41. The arrangement is such that after the follower plates are secured in position the piston is operatively connected to the fly wheel of the shaft.

Preferably, as shown, the lower half of the casing is filled with an oil or other lubricant 42, shown so that as the parts rotate they are effectively lubricated. To more effectively lubricate the ball and socket joints, the fly wheel is provided with an oil duct 43 and the crank arm 34 is provided with a similar oil duct 44. The lower position of' the crank is shown in dotted lines in Fig. 1 and it will be noted that the angular relation of the crank pin to the shaft and piston is changed very little during the rotation of the shaft and piston. This results in reducing the frictional and torsional strain on the crank pin to a minimum.

Describing now the port arrangement in the.cylinder and piston, the former is provided with an inlet port 45 and a diametrically disposed exhaust port 46. A suitable pipe 47 leads to the source of supply and a suitable pipe 48 leads from the dis- I charge or exhaust port depending upon whether the device is used as a pump or as an engine. As a feature of the invention, these two ports coiiperate with a generally the-piston. This duct comprises angularly disposed arms 50 and 51 and a main trunk or leg portion 52. The position of these duct members is shown more clearly in Fig. 4. The arrangement is such that at predegular position of the duct members is made necessary by the fact that the piston not only has a reciprocatory but also a rotary movement. 7

Assuming that the machine is used as a pump, then in the position of the piston shown in Fig. 1, the latter has just finished its power stroke and is ready to start on the intake stroke. As the piston starts on its intake stroke the duct 50 is rocked into communication with the inlet port 45 and continues to register with this port until the end' of the intake stroke is reached. When the piston reaches the limit of its intake stroke, shown in dotted lines in Fig. 1, the trunk 52 has passed out of communication with the port 45. As the piston starts on its power stroke the rear end of the duct 52 registers with the discharge port '46 and continues to-register throughout its" length and throughout the length of the arm 51. i

When the device is used as an engine the ports and ducts operate in exactly the same provide means for preventing undue end thrust on the drive shaft 12. This end thrust results from the fact that the gas under high pressure will inevitably leak past the piston into the main casing and bring the pressure on the shaft and fly wheel. To avoid this I provide a by-pass hair tube 53, (inc end of which-is connected as shown at .54 to the piston cylinder .and the other end is connected to an annular chamber 55 formed by grooving the periphery of the drive shaft. The groove 55 communicates with the tube 53 through the port 56, formed in the bearing 5 and duct 57 formed in, the screw 58 which receives the end of the pipe 53. The screw 58 is suitably seated in a boss 59 formed in the bearing. The annular groove or chamber 55 .izing member is of course not necessary when the device is used as a'low-pressure pump, although it may be used if desired.

The operation of the mechanism is apparent from the foregoing description, whether it be used as apump or engine and therefore need not be further described in detail.

I claim as my invention:

1. The combination with a main casing, of a cylinder leading from said casing, angularly disposed thereto, and provided with inlet and outlet ports, a piston seated in said cylinder and projecting into the casing chamber, means for effecting a combined rotary and reciprocatory motion of the piston, the latter having a duct formed in its periphery and controlling the inlet and outlet ports of the cylinder.

2. The combination witha main casing provided at one side with a shaft bearing and at,its other side with a ported cylinder, angularly disposed tosaid casing, a shaft in said, bearingand provided at its inner end with a fly Wheel inclosed within the casing, a piston seated in said cylinder and providedat its inner end with a crank arm, and a connecting rod secured by ball and socket joint to the piston and fly wheel.

3. The combination with a main casing,

provided at one end with a shaft bearing, of a ported cylinder extending from the other side of the casing, a shaft in said bearing, a piston in said cylinder and having a combined rotary and reciprocatory movement, the inner end of said piston extending into the casing and having a crank arm, and a connecting rod secured at one end to said crank arm and at its other end operatively connected to the shaft.

4. The combination with a main casing provided with a shaft bearing at one side and a ported cylinder at the other side, of a shaft rotating in said bearing, a piston movably mounted in said cylinder, operative connections between the piston and shaft whereby they: move in timed relation of the shaft,

; portion,

with each other and an equalizing member communicating at one end with the cylinder and at its other end with a chamber formed in the shaft. 5. The combination with a casing provided at one side with a shaft bearing, and at its. other side with a ported cylinder, a shaft in said bearing and a piston in said cylinder, operative connections between the? shaft and piston and means for equalizing the pressure on opposite sides of the end of the shaft.

6. The combination with a main casing provided with a shaft bearing, ashaft in said bearing and extending into the casing, and provided at its outer end with a shoulder-portion, a flywheel on the inner end a stuffing box adjustably connected to the outer end of the shaft hearing, a thrust member interposed between the fly wheel and shaft bearing and a sec ond thrust member interposed between the ihoulder portion of theshaft and stufling ox. I 7. The combination'with a main casing provided with a shaft bearing, of a ported cylinder leading from said casing and angularly disposed relative'thereto, a shaft rotating-in said bearing, a piston movably mounted in the cylinder, and operative connections between the piston and shaft whereby they move in timed relation with each other. 7

8. The combination with a main body of a pair of hollow supporting members connected thereto and angularly disposed relative to each other, a movable member mounted in one of said supports and adapted to have a rotary movement and a second movable member mounted in said other support and adapted to have a combined rotary and 'reciprocatory motion and operative connections between said movable members whereby they are actuated 90 in timed relation.

' CHARLES A. ANDERSON. 

